JP6443845B2 - cart - Google Patents

Description

  The present invention relates to a cart.

  Conventionally, a cart having a shutter device in which a shutter cloth is wound around a winding shaft using a coil spring as a driving source, and a bottom bar for opening / closing operation is attached to the tip of the shutter cloth so that the shutter cloth is automatically wound. Widely known (see, for example, Patent Document 1).

Japanese Utility Model Publication No. 63-9934

  By the way, in the conventional cart shutter device, there is a problem that the shutter cloth cannot be completely wound up when the biasing force of the coil spring is weak. Accordingly, the bottom bar is inclined with respect to the horizontal direction, and the opening of the cart is not completely opened.

  An object of the present invention is to provide a cart that can prevent the opening of the shutter device from becoming incomplete in the cart having the shutter device.

According to a first aspect of the present invention, a cart includes a cart body having a rectangular opening along the vertical direction, and a plurality of casters that movably support the cart body, The cart body includes a shutter device that opens and closes the opening. The shutter device is supported by the casing having a bottom surface extending in the width direction of the opening, and the coil spring is twisted. A winding shaft that generates a rotational biasing force, a shutter cloth that is wound around the winding shaft and passes through the front edge of the bottom surface of the casing and extends downward, and is attached to the tip of the shutter cloth. Te, and extending in the width direction, and bottom bars which upward movement is restricted by the bottom surface, is provided to the strut rails extending in the vertical direction on both sides of the opening A rail portion for guiding the opposite ends of the bottom bar, the magnet provided on the upper portion of the bottom bar, provided at the same position and the magnet when viewed from above a bottom surface of the casing is made of a magnetic substance possess a magnet receiving portion, the opening of the opening can be prevented from becoming incomplete.

  According to such a configuration, the opening of the shutter device can be prevented from being incomplete due to the adsorption of the magnet provided on the bottom bar and the magnet receiving portion provided on the casing.

In the cart, the magnets may be disposed at both ends of the bottom bar in the width direction.
According to such a configuration, both ends of the bottom bar can be reliably adsorbed.

  According to the present invention, it is possible to prevent the opening of the shutter device from being incomplete due to the adsorption of the magnet provided on the bottom bar and the magnet receiving portion provided on the casing.

It is a front view of the cart of the embodiment of the present invention. It is a side view of the cart of the embodiment of the present invention. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 1 and is a cross-sectional view of the shutter device as viewed from above. FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 3 and is a cross-sectional view of the shutter device as viewed from the front. It is a sectional side view of a shutter apparatus.

Hereinafter, a cart 1 according to an embodiment of the present invention will be described in detail with reference to the drawings.
As shown in FIG. 1, a cart 1 according to this embodiment includes a cart body 2 having a pair of rectangular openings 4 along the vertical direction V, and four casters 3 (wheels) that support the cart body 2 movably. ) And.

The cart body 2 is a rectangular parallelepiped portion having an internal space, and includes a rectangular base portion 6, four support rails 7, a pair of side wall portions 8, a rectangular top plate portion 9, and a cart body. 2 has a shutter device 10 that opens and closes the opening 4, and a shelf 11 provided in the internal space of the cart body 2.
The pair of openings 4 of the cart body 2 faces the front-rear direction F.
The shutter device 10 is a device that is long in the width direction W, and is attached to the front end and the rear end of the top plate portion 9 of the cart body 2.
Hereinafter, a direction orthogonal to the shutter cloth 20 of the shutter device 10 is referred to as a front-rear direction F, and a horizontal direction orthogonal to the direction is referred to as a width direction W.

  The base part 6 is a rectangular member. The base portion 6 is supported by four casters 3. The casters 3 are arranged at the four corners of the base. The base part 6 is formed of a wooden plate. The material which comprises the base part 6 is not restricted to this, You may form the base part 6 with a metal. Further, the number of casters 3 is not limited to this, and the cart body 2 may be supported using three casters 3.

The support rail 7 is a columnar member extending upward from the four corners of the base portion 6. The support rail 7 is made of metal. The material constituting the support rail 7 is not limited to this.
The top plate portion 9 is a rectangular member connected to the upper end of the support rail 7.

  The side wall portion 8 is a wall surface along the front-rear direction F. The side wall portion 8 is disposed between the front support rail 7 and the rear support rail 7. The side wall portion 8 is made of resin. The material which comprises the side wall part 8 is not restricted to this, For example, you may form the side wall part 8 with a metal.

The shelf part 11 includes a pillar part 13 extending in the vertical direction V, a plurality of support members 14 attached to the pillar part 13, and a shelf body 15 supported from below by the support member 14. Yes.
The column portion 13 is a columnar member that extends in the vertical direction V across the top plate portion 9 and the base portion 6. The column portion 13 is an internal space of the cart body 2 and is provided in the vicinity of the four column rails 7 and in the middle between the front column rails 7 and the rear column rails 7.
The support member 14 is a member that supports the shelf body 15 and is fixed to the column portion 13. The support member 14 is formed so as to protrude inward in the width direction W from the column portion 13. The support member 14 is fastened to the column portion 13 by screws, for example.

The shelf main body 15 is a plate-like member formed by combining metal wires. The number of the shelf main bodies 15 and the interval between the shelf main bodies 15 adjacent to each other in the vertical direction can be appropriately changed.
The configuration of the shelf main body 15 is not limited to that described above, and for example, the shelf main body 15 may be formed of a resin plate.

  As shown in FIGS. 3, 4, and 5, the shutter device 10 includes a casing 17, a winding shaft 18 supported by the casing 17, a guide roll 19, and a shutter wound by the winding shaft 18. A cloth 20 and a bottom bar 21 attached to the tip of the shutter cloth 20 are provided.

The casing 17 includes a rectangular bottom surface 17a extending in the width direction W, a back surface 17b formed so as to protrude upward from one end in the front-rear direction F of the bottom surface 17a, and both ends of the bottom surface 17a in the width direction W. And a pair of side surfaces 17c formed so as to protrude upward. The bottom surface 17a, the back surface 17b, and the pair of side wall surfaces 17c do not need to be formed integrally.
A winding shaft support portion 23 that supports the winding shaft 18 and a guide roll support portion 24 that rotatably supports the guide roll 19 are formed on the side surface 17 c of the casing 17. The winding shaft support portion 23 and the guide roll support portion 24 are configured so that the winding shaft 18 and the guide roll 19 extend in the width direction W, and the winding shaft 18 and the guide roll 19 are parallel to each other. The winding shaft 18 and the guide roll 19 are supported.
As shown in FIG. 5, the shutter cloth 20 extends downward through the front edge 25 of the bottom surface 17 a.

The winding shaft 18 includes a cylindrical winding shaft main body 26 and an automatic winding unit 27 built in the winding shaft main body 26.
The automatic winding unit 27 includes support shafts 28 and 29 fixed to the winding shaft support portion 23, side caps 30 and 31, a coil spring 32, a guide core rod 33, and a spring receiver 34. doing. The side caps 30 and 31 are formed with through holes 36 extending in the width direction W.

The support shafts 28 and 29 are columnar members fixed to the winding shaft support portion 23 of the casing 17.
One of the side caps 30 and 31 is fitted to the winding shaft body 26 so as not to rotate, and the other of the side caps 30 and 31 is attached to the support shafts 28 and 29 so as to be rotatable. The support shafts 28 and 29 are inserted through the through holes 36 of the side caps 30 and 31.

On one side of the side cap in the width direction W, a spring receiving portion 35 that receives the coil spring 32 is formed. The end of the coil spring 32 is fixed to the spring receiver 35.
The spring receiver 34 is fixed to an intermediate portion of the winding shaft main body 26. The end of the coil spring 32 is fixed to a spring receiver 34. The spring receiver 34 holds the coil spring 32 in cooperation with the spring receiver 35 of the side caps 30 and 31.

  In the shutter device 10, by pulling out the shutter cloth 20, the spring receiver 34 rotates with the winding shaft body 26 to twist the coil spring 32, and the rotational biasing force due to the restoring force of the twisting is taken up by the winding device. The shaft 18 is a driving force for winding the shutter cloth 20. Note that the mechanism for winding the shutter cloth 20 by the shutter device 10 is not limited to the one described above, and any mechanism can be used.

  The guide roll 19 is a columnar member disposed in parallel with the winding shaft 18. Both ends of the guide roll 19 are supported by guide roll support portions 24. The guide roll 19 is disposed in front of the winding shaft 18 and slightly above the winding shaft 18.

  The bottom bar 21 includes a rectangular tubular bottom bar casing 37, a pair of bottom bar caps 38 attached to both ends of the bottom bar casing 37, and two first magnets 39 provided on the lower surface of the bottom bar casing 37. And two second magnets 40 (magnets) provided on the upper surface of the bottom bar casing 37. That is, the second magnet 40 is provided on the top of the bottom bar 21.

  The bottom bar casing 37 is made of metal. Two first magnet openings 41 for exposing the first magnet 39 are formed on the lower surface of the bottom bar casing 37. A first magnet bracket 42 is provided in the first magnet opening 41. The first magnet bracket 42 includes a first magnet mounting plate 43 disposed in parallel with the lower surface of the bottom bar casing 37, and a support 44 that fixes the first magnet mounting plate 43 to the lower surface of the bottom bar casing 37. doing.

  The bottom bar cap 38 includes a bottom bar cap main body 46 that is inserted into an end portion of the bottom bar casing 37, and a shutter connection portion 47 that protrudes outward in the width direction W from the bottom bar cap main body 46.

  The first magnet 39 has a rectangular parallelepiped shape, and is fixed so that the lower portion is exposed from the two first magnet openings 41 formed on the lower surface of the bottom bar casing 37. The first magnet 39 is fixed to the bottom bar casing 37 via the first magnet bracket 42.

The second magnet 40 has a plate shape and is attached to the lower surface of the upper wall 37 a of the bottom bar casing 37. The second magnet 40 is attached so that the main surface of the second magnet 40 and the upper wall 37a of the bottom bar casing 37 are parallel to each other. The second magnet 40 is fixed in the vicinity of both ends in the width direction W of the bottom bar casing 37.
The second magnet 40 is fixed to the bottom bar casing 37 by adhesion. The fixing method of the 2nd magnet 40 is not restricted to this, For example, you may fix the 2nd magnet 40 using a screw | thread.

The second magnet 40 is preferably a magnet having a strong magnetic force such as a neodymium magnet.
The number of the second magnets 40 is not limited to two. For example, three or more second magnets 40 may be fixed to the bottom bar casing 17, or a single second magnet 40 may be fixed to the center of the bottom bar casing 17.

Two metal plates 48 (magnet receiving portions) are attached to the lower surface of the lower wall 17a of the casing 17 at the same position as the second magnet 40 as viewed from above. That is, the metal plate 48 is provided in the lower part of the casing 17. The metal plate 48 is fixed to the casing 17 by a flat head screw 49. A counterbore is formed on the metal plate 48 corresponding to the head of the countersunk screw 49.
The metal plate 48 is made of ferritic stainless steel (SUS430). The metal forming the metal plate 48 is not limited to this, and any metal having magnetism may be used.
The positions in the width direction W of the two metal plates 48 correspond to the positions of the two second magnets 40.

  A metal plate corresponding to the first magnet 39 is also attached to the upper surface of the base portion 6. The base portion 6 itself may be formed of a material having a magnetic material, and the metal plate may be omitted.

  As shown in FIG. 3, a rail portion 51 that guides the bottom bar cap 38 of the bottom bar 21 is formed on the support rail 7. The rail portion 51 is formed so as to be recessed from the inner side wall 7a of the support rail 7 to the outside in the width direction W, and extends in the vertical direction V.

In the cart 1 configured as described above, for example, food or the like can be placed on the shelf 11 and conveyed.
Further, the opening 4 of the cart body 2 can be closed using the shutter device 10. Specifically, the shutter device 10 of the cart 1 can pull out the shutter cloth 20 by operating the bottom bar 21 against the rotational biasing force of the coil spring 32 built in the winding shaft 18.

  By adsorbing the first magnet 39 of the bottom bar 21 and the metal plate 48 provided on the base portion 6, the opening 4 can be closed in a state where the shutter cloth 20 is always tensioned.

  When opening the shutter device 10, the second magnet 40 of the bottom bar 21 and the metal plate 48 attached to the casing 17 are attracted. This prevents the opening of the shutter device 10 from being incomplete. That is, when the biasing force of the coil spring 32 is weak, it is possible to prevent the shutter cloth 20 from being completely wound up. Thereby, it can prevent that the bottom bar 21 becomes diagonal with respect to a horizontal direction, or the opening part 4 of the cart 1 is not opened completely.

  According to the embodiment, the second magnet 40 provided on the bottom bar 21 and the metal plate 48 provided on the casing 17 are attracted to prevent the opening of the shutter device 10 from being incomplete. it can.

  Further, since the second magnet 40 is disposed at both ends of the bottom bar 21, both ends of the bottom bar 21 can be reliably adsorbed.

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes design changes and the like within a scope not departing from the gist of the present invention. .
In the cart 1 of the above-described embodiment, the shutter device 10 is provided in the opening 4 on the front surface and the rear surface of the cart main body 2. For example, the shutter device 10 may be provided on the front surface and the door may be provided on the rear surface.

DESCRIPTION OF SYMBOLS 1 Cart 2 Cart main body 3 Caster 4 Opening part 6 Base part 7 Support rail 8 Side wall part 9 Top plate part 10 Shutter device 11 Shelf part 13 Pillar part 14 Support member 15 Shelf part main body 17 Casing 17a Bottom surface 17b Back surface 17c Side surface 18 Winding Shaft 19 Guide roll 20 Shutter cloth 21 Bottom bar 23 Winding shaft support 24 Guide roll support 25 Front edge 26 Winding shaft body 27 Automatic winding unit 28 Support shaft 29 Support shaft 30 Side cap 31 Side cap 32 Coil spring 33 Guide Core bar 34 Spring receiver 35 Spring receiver 36 Through hole 37 Bottom bar casing 37a Upper wall 38 Bottom bar cap 39 First magnet 40 Second magnet (magnet)
41 First magnet opening 42 First magnet bracket 43 First magnet mounting plate 44 Support 46 Bottom bar cap body 47 Shutter connecting portion 48 Metal plate (magnet receiving portion)
51 Rail part F Longitudinal direction V Vertical direction W Width direction

Claims (2)

A cart body having a rectangular opening along the vertical direction;
A cart comprising a plurality of casters for movably supporting the cart body,
The cart body has a shutter device that opens and closes the opening,
The shutter device is
A casing having a bottom surface extending in the width direction of the opening;
A winding shaft that is supported by the casing and generates a rotational biasing force by torsion of a coil spring;
A shutter cloth wound around the winding shaft and extending downward through the front edge of the bottom surface of the casing;
A bottom bar which is attached to the tip of the shutter fabric, and extending in the width direction, the upward movement of the said bottom surface is restricted,
Rail portions that are provided on support rails that extend in the vertical direction on both sides of the opening, and that guide both ends of the bottom bar;
A magnet provided at the top of the bottom bar;
A bottom surface of the casing is provided at the same position as the magnet when viewed from above, possess a magnet receiving portion formed by a magnetic material, a
A cart capable of preventing an incomplete opening of the opening .   The cart according to claim 1, wherein the magnets are disposed at both ends of the bottom bar in the width direction.

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